28890081

素因数分解:

$3^3\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{239}}^1$

素因数の和:307

約数の個数: 48

約数和(自身を含む): 48518400

約数和(自身を除く): 19628319

約数列:

[1, 3, 9, 11, 27, 33, 37, 99, 111, 121, 239, 297, 333, 363, 407, 717, 999, 1089, 1221, 2151, 2629, 3267, 3663, 4477, 6453, 7887, 8843, 10989, 13431, 23661, 26529, 28919, 40293, 70983, 79587, 86757, 97273, 120879, 238761, 260271, 291819, 780813, 875457, 1070003, 2626371, 3210009, 9630027, 28890081]

約数ペア:

[(1, 28890081), (3, 9630027), (9, 3210009), (11, 2626371), (27, 1070003), (33, 875457), (37, 780813), (99, 291819), (111, 260271), (121, 238761), (239, 120879), (297, 97273), (333, 86757), (363, 79587), (407, 70983), (717, 40293), (999, 28919), (1089, 26529), (1221, 23661), (2151, 13431), (2629, 10989), (3267, 8843), (3663, 7887), (4477, 6453)]